Ge-flówan

According to the Old English Dictionary:

ge-flówan

p. -fleów, pl. -fleówon; pp. -flówen To overflow; inundāre :-- Swá hit ðære eá flód ǽr gefleów as the flowing of the river formerly flowed over it, Ors. 1, 3; Bos. 27, 28. ge-flowan